1 /*- 2 * Copyright (c) 2008 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/param.h> 28 #include <sys/socket.h> 29 #include <sys/un.h> 30 31 #include <netinet/in.h> 32 33 #include <arpa/inet.h> 34 35 #include <err.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include <unistd.h> 41 42 /* 43 * The UDP code allows transmitting zero-byte datagrams, but are they 44 * received? 45 */ 46 47 #define THEPORT 9543 /* Arbitrary. */ 48 49 static void 50 usage(void) 51 { 52 53 errx(-1, "no arguments allowed\n"); 54 } 55 56 static void 57 test(int domain, const char *domainstr, struct sockaddr *sa, socklen_t salen) 58 { 59 int sock_send, sock_receive; 60 ssize_t size; 61 62 sock_send = socket(domain, SOCK_DGRAM, 0); 63 if (sock_send < 0) 64 err(-1, "socket(%s, SOCK_DGRAM, 0)", domainstr); 65 66 sock_receive = socket(domain, SOCK_DGRAM, 0); 67 if (sock_receive < 0) 68 err(-1, "socket(%s, SOCK_DGRAM, 0)", domainstr); 69 70 if (bind(sock_receive, sa, salen) < 0) 71 err(-1, "Protocol %s bind(sock_receive)", domainstr); 72 if (fcntl(sock_receive, F_SETFL, O_NONBLOCK, 1) < 0) 73 err(-1, "Protocll %s fcntl(sock_receive, FL_SETFL, " 74 "O_NONBLOCK)", domainstr); 75 76 if (connect(sock_send, sa, salen) < 0) 77 err(-1, "Protocol %s connect(sock_send)", domainstr); 78 79 size = recv(sock_receive, NULL, 0, 0); 80 if (size > 0) 81 errx(-1, "Protocol %s recv(sock_receive, NULL, 0) before: %zd", 82 domainstr, size); 83 else if (size < 0) 84 err(-1, "Protocol %s recv(sock_receive, NULL, 0) before", 85 domainstr); 86 87 size = send(sock_send, NULL, 0, 0); 88 if (size < 0) 89 err(-1, "Protocol %s send(sock_send, NULL, 0)", domainstr); 90 91 (void)sleep(1); 92 size = recv(sock_receive, NULL, 0, 0); 93 if (size < 0) 94 err(-1, "Protocol %s recv(sock_receive, NULL, 0) test", 95 domainstr); 96 97 size = recv(sock_receive, NULL, 0, 0); 98 if (size > 0) 99 errx(-1, "Protocol %s recv(sock_receive, NULL, 0) after: %zd", 100 domainstr, size); 101 else if (size < 0) 102 err(-1, "Protocol %s recv(sock_receive, NULL, 0) after", 103 domainstr); 104 } 105 106 int 107 main(int argc, __unused char *argv[]) 108 { 109 struct sockaddr_un sun; 110 struct sockaddr_in6 sin6; 111 struct sockaddr_in sin; 112 struct in6_addr loopback6addr = IN6ADDR_LOOPBACK_INIT; 113 114 if (argc != 1) 115 usage(); 116 117 bzero(&sin, sizeof(sin)); 118 sin.sin_len = sizeof(sin); 119 sin.sin_family = AF_INET; 120 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 121 sin.sin_port = htons(THEPORT); 122 123 test(PF_INET, "PF_INET", (struct sockaddr *)&sin, sizeof(sin)); 124 125 bzero(&sin6, sizeof(sin6)); 126 sin6.sin6_len = sizeof(sin6); 127 sin6.sin6_family = AF_INET6; 128 sin6.sin6_addr = loopback6addr; 129 sin6.sin6_port = htons(THEPORT); 130 131 test(PF_INET6, "PF_INET6", (struct sockaddr *)&sin6, sizeof(sin6)); 132 133 bzero(&sun, sizeof(sun)); 134 sun.sun_len = sizeof(sun); 135 sun.sun_family = AF_LOCAL; 136 strlcpy(sun.sun_path, "/tmp/udpzerosize-socket", sizeof(sun.sun_path)); 137 if (unlink(sun.sun_path) < 0 && errno != ENOENT) 138 err(-1, "unlink: %s", sun.sun_path); 139 140 test(PF_LOCAL, "PF_LOCAL", (struct sockaddr *)&sun, sizeof(sun)); 141 142 return (0); 143 } 144